In Qur'an
A derived term with similar meaning is mentioned in the Qur'an aIt is He Who has sent down to you the Book. In it are Verses that are entirely clear, they are the foundations of the Book; and others ''not entirely clear''. So as for those in whose hearts there is a deviation (from the truth) they follow that which is not entirely clear thereof, seeking Al-Fitnah (polytheism and trials, etc.), and seeking for its hidden meanings, but none knows its hidden meanings save Allâh. And those who are firmly grounded in knowledge say: "We believe in it; the whole of it (clear and unclear Verses) are from our Lord." And none receive admonition except men of understanding.
In Hadith
Muhammad is reported to have commentex on the above verse: «فَإِذَا رَأَيْتِ الَّذِينَ يَتَّبِعُونَ مَا تَشَابَهَ مِنْهُ؛ فَأُولئِكَ الَّذِينَ سَمَّى اللهُ، فَاحْذَرُوهُم» (When you see those who follow what is not so clear of the Qur'an, then they are those whom God described, so beware of them.)''Notes
{{Reflist Islamic terminology